PCAP_FILENO(3) | Library Functions Manual | PCAP_FILENO(3)

# NAME

pcap_fileno - get the file descriptor for a live capture

# SYNOPSIS

#include <pcap/pcap.h>

int pcap_fileno(pcap_t *p);

# DESCRIPTION

If p refers to a network device that was opened for a live capture using a combination of pcap_create() and pcap_activate(), or using pcap_open_live(), pcap_fileno() returns the file descriptor from which captured packets are read.

If p refers to a ``savefile'' that was opened using functions such as pcap_open_offline() or pcap_fopen_offline(), a ``dead'' pcap_t opened using pcap_open_dead(), or a pcap_t that was created with pcap_create() but that has not yet been activated with pcap_activate(), it returns -1.

# SEE ALSO

pcap(3), pcap_create(3), pcap_activate(3), pcap_open_live(3), pcap_open_offline(3), pcap_fopen_offline(3), pcap_open_dead(3)

5 April 2008 |